According to local customs, which of the following is not true?

A、In the U.S.
A、, you should call to explain if you are going to be more than 15 minutes late for a party, lunch, or dinner.;
B、 In China, you should cover your mouth when you are using a toothpick.;
C、 In Japan, you should take off your shoes before entering someone’s home.;
D、 In Thailand, you can touch a child’s head if you think he is very cute.